Fenestra MCP

A UI stack built for the agent loop. Describe a UI as JSON, render it natively, and check it in CI. There's no compile step in that loop, and no flaky screenshots.

People who need browser automation tools inside Claude, Cursor, VS Code, or another MCP client. The project is written in Rust.

VERIFIED ACTIVE

LAST COMMIT 2026-08-13 · ★ 12 · #176 OF 196 MAINTAINED BROWSER AUTOMATION · VERIFIED 2026-08-25

Apache-2.0 · Rust servers · how we verify → /methodology

01 · Install Fenestra MCP

Claude Desktop

Settings → Extensions → Install, then select the https://github.com/richer-richard/fenestra/releases/download/fenestra-mcp-v0.40.1/fenestra-mcp-0.40.1-macos-arm64.mcpb .mcpb bundle

02 · Evidence

Security posture

What to check before giving this server access to your agent - from the registry, GitHub, and our own probes. We don't score safety; we show what's verifiable.

runs as Claude Desktop extension (.mcpb bundle)

license Apache-2.0 - declared in the repository

registry namespace io.github.richer-richard is GitHub-verified and matches the repo owner

03 · What Fenestra MCP can do

Prose above is summarized from the project's README and registry record - no invented capabilities.

Latest releases

v0.41.0 · 2026-08-11

See CHANGELOG.md for details. · The adoption batch: crash fixes, effect layer, A2UI renderer, and the outward-facing edge · a2ui: typed fidelity notes, and the twelve bugs the review found · 0.41.0: derive the publish…

fenestra-mcp-v0.40.1 · 2026-07-10

MCPB (MCP Bundle) release of fenestra-mcp for the official MCP Registry, since the registry currently rejects registryType "cargo" (tracked upstream). · This bundle is macOS arm64 only for now, built from the same…

v0.40.0 · 2026-07-09

See CHANGELOG.md for details. · fenestra-motion: frame-pure motion graphics with headless verification · Hardening + correctness pass: close agent-reachable DoS vectors, fix retained-state bugs · community batch - JSON…

04 · Who maintains Fenestra MCP

fenestra-mcp is maintained by richer-richard. We track 2 MCP servers from richer-richard - 2 actively maintained, 26 combined GitHub stars, oldest repo from Jun 2026. Full record: all servers from richer-richard.

Cochlea Render, analyze, and verify audio (WAV/FLAC/mp3/ogg) offline and deterministically via MCP tools. ★ 14

05 · Facts

repository: github.com/richer-richard/fenestra
category: browser automation - ranked #176 of 196 actively-maintained browser automation servers as of 2026-08-25.
release cadence: 10+ releases in the last 90 days (latest 2026-08-11)
registry: io.github.richer-richard/fenestra-mcp (active, first published 2026-07-10)
packages: mcpb:https://github.com/richer-richard/fenestra/releases/download/fenestra-mcp-v0.40.1/fenestra-mcp-0.40.1-macos-arm64.mcpb

06 · Fenestra MCP FAQ

What is Fenestra MCP?

A UI stack built for the agent loop. Describe a UI as JSON, render it natively, and check it in CI. There's no compile step in that loop, and no flaky screenshots.

Is Fenestra MCP still maintained?

Yes - as of 2026-08-25, its last commit was 2026-08-13 and it shipped 10+ releases in the last 90 days. We re-verify nightly.

07 · Alternatives to Fenestra MCP

Alternatives to Fenestra MCP

Maintained browser automation servers if Fenestra MCP isn't the fit.

Pairs well with

Servers that cover what Fenestra MCP doesn't - only shown when the pairing reason fits the companion.

More browser automation MCP servers · IDA Pro MCP Fusion · Browser Agent · Mobile Device MCP · Sassy MCP · Scrapfly MCP Server

More Rust MCP servers · Osc Bridge · 4da MCP Server · Ruv Swarm · Domain Check · Vestige · see all